Port St. Lucie, Florida Air Quality
Port St. Lucie air quality today — the AQI, the main pollutant, and whether it’s safe to exercise outside right now
Port St. Lucie, FL · Air quality right now
The air quality index in Port St. Lucie, FL is 41 (Good) right now — safe for outdoor activity.
Is it safe to be outside in Port St. Lucie today?
AQI 41 Yes — air quality is Good
Air is clean — great for outdoor activity.Main pollutant: PM2.5Observed 10:00 AM EDT
Pollutants right now
- PM2.54.9 µg/m³Main pollutantfine particles — smoke, exhaust, soot
- PM106.4 µg/m³coarse particles — dust, pollen, ash
- Ozone61 µg/m³smog — builds on hot, sunny days
- NO₂4.4 µg/m³nitrogen dioxide — traffic, combustion
ExerciseOK to run — no air-quality limits on outdoor exercise.
How to read Port St. Lucie’s air quality
Guides: The AQI Scale, Explained · Air Quality Alerts, Decoded · How to Read a Wildfire Smoke Map · Why Wildfire Smoke Travels 1,000 Miles.
Air quality over time in Port St. Lucie
Across the EPA’s county records from 2020 to 2025, Port St. Lucie’s cleanest year was 2020 (median AQI 33) and its most polluted was 2023 (median AQI 35); the typical (median) day has held roughly steady since 2020.
| Year | Median AQI | Unhealthy+ | Main pollutant | USG | Moderate | Good |
|---|---|---|---|---|---|---|
| 2020 | 33 | 0 | Ozone | 0 | 9 | 351 |
| 2021 | 33 | 0 | Ozone | 0 | 10 | 353 |
| 2022 | 33 | 0 | Ozone | 0 | 6 | 352 |
| 2023 | 35 | 0 | Ozone | 0 | 9 | 352 |
| 2024 | 35 | 0 | Ozone | 0 | 9 | 353 |
| 2025 | 34 | 0 | Ozone | 0 | 13 | 351 |
“USG” is Unhealthy for Sensitive Groups (AQI 101–150); “Unhealthy+” combines the Unhealthy, Very Unhealthy, and Hazardous days. In 2024 the EPA tightened the annual fine-particle (PM2.5) standard to 9 µg/m³ from the previous 12 µg/m³, so counties near the old limit read worse against the new one. Source: EPA AQS annual summaries, 2020–2025.
Frequently asked
- What was the worst year for air quality in Port St. Lucie?
- No day in Port St. Lucie's county topped AQI 100 in the EPA's 2020–2025 records. The highest median AQI came in 2023, at 35.
- How many unhealthy air days does Port St. Lucie have?
- None: across 2020–2025, no day in Port St. Lucie's county had an AQI above 100 in the EPA's records (2168 days reported).
- What's the main air pollutant in Port St. Lucie?
- Ozone: it drove Port St. Lucie's county AQI on the most days in every year of the EPA's 2020–2025 records.